Be used for realizing the method for channel associated re-offhook line signaling at next generation network
For being realized in next generation network
With the method and technology field of ^^ picked up line signalings network (next generation network are shooted a retrievable arrow the present invention relates to next, abbreviation NGN) field, more particularly to a kind of method for realizing channel associated re-offhook line signaling in next generation network.The so-called channel associated signalling of background technology is a kind of signaling of interexchange, i.e. speech information and its corresponding signaling are transmitted on same path, by the control signal required for speech channel by the speech channel has the signaling channel of constant connection to transmit in itself or therewith.Channel associated signalling is made up of line signalling and register signaling two parts：Line signalling such as mainly transmits the occupancy of some related relay lines, response, taken out stitches at the content；Register signaling is that, by being transmitted between " register(system) " in two exchange, its major function is transmission address information.So that cno.1 is with road as an example, illustrate realization of the channel associated signalling in PSTN network.Fig. 1 is in Public Switched Telephone Network（Public switched telephone network, abbreviation PSTN) in the basic interaction flow of interoffice channel associated signalling, therein 1,2,9 and 10 are line signallings, and 3,4,5,6,7 and 8 be register signaling.In existing NGN networks, soft switch（Softswitch, SS) WMG is controlled by a series of bags of H.248 protocol definition, event and signal（Media gateway, abbreviation MG) realize the docking of channel associated signalling.Bag is used for defining the associative operation on the destination node with road type, event is used for defining that a series of soft switch SS need that WMG MG detects with road related signaling, and signal be used for defining-series of media gateway detect need to report soft switch SS with road related signaling.Related H.248 tongue icas, bcas and r2 bag of bag 4, wherein, occupancy defined in bcas bags（), sz taking confirms（) and off-hook sza（) etc. ans event and signal, realize the detection of these channel associated signallings and report soft switch SS;Forward direction on-hook (cf), backward on-hook defined in icas bags（) and called state cb（) etc. sis event and signal, realize the detection of these channel associated signallings and report soft switch SS;And register(system) dependent event and signal defined in r2 bags（Addr detection) and soft switch SS is reported.Fig. 2 show realize in a NGN network with this call flow of roadbed.Wherein, SS realizes that channel associated signalling is interacted by H.248 protocol integrated test system MG.
In PSTN, the release after the completion of calling and called call has three kinds of modes：It is Calling Party Release respectively, is called control release mode and mutual not control release mode.It is called to listen busy tone if caller elder generation on-hook, caller is idle under Calling Party Release.If called elder generation's on-hook, if called off-hook again, producing one, off hook signal is to caller again, and calling and called reenter call in the range of certain time.Under called control release mode, if called elder generation's on-hook, is called the free time, busy tone is listened in caller.If the on-hook of caller elder generation, if caller off-hook again in the range of certain time, producing one, off hook signal is to called again, and calling and called reenter call.Mutually not under control release mode, no matter caller or called first osmanthus machine, a side listens busy tone in addition.Fig. 3 is the flow for showing to realize picked up line signal again in PSTN under Calling Party Release after conversing.PSTN Zhong Sui roads dock, it is not necessary to the intervention of MGCP H.248, by one again picked up line signaling can just complete.And in NGN, H.248.28 the ITU-T Recommendation of MGCP H.248 specification give the related specifications between soft switch SS and WMG MG by H.248 protocol realization interoffice channel associated signalling.For off-hook again, under current NGN framework, interaction of the signaling of picked up line again of channel associated signalling between soft switch SS and WMG MG is not supported.The problem of content of the invention is it is an object of the invention to solve not supporting the interactive picked up line signaling again between soft switch SS and WMG MG in the prior art.The main thought of the present invention is off-hook event and signal again defined in related protocol, called so that being set up between calling subscribe and called subscriber by channel associated signalling, and after call, if the controlled side's on-hook of call, gateway where then soft switch notifies call prosecution detects off-hook event again, if conversing prosecution user off-hook again within a certain period of time, then gateway where prosecution user is sent to soft switch and reports off-hook event again, soft switch is received after the off-hook event again of prosecution user gateway, gateway sends off hook signal again where to master control side user, then calling subscribe and called subscriber converse again.According to the present invention there is provided a kind of method for realizing channel associated re-offhook line signaling in next generation network, this method includes following processing：Step S402, increases off-hook again in H.248 related protocol
Event and signal；And step S404, after calling subscribe and called subscriber's end of conversation, according to being realized between soft switch and gateway described the presence or absence of off hook signal again again off-hook with route line signaling interaction.Wherein, off-hook event and the signal again are extended in the existing bag of H.248 related protocol, or off-hook event and signal again described in extending in the bag newly defined.Preferably, existing bag is channel associated signalling associated packet H.248 defined in serial protocols, including bcas bags, icas bags etc..In addition, when being wrapped using new definition, the rule that docking Chinese prescription is observed when realizing with route line signaling increases a bag.Delivery mode after calling subscribe and called subscriber's end of conversation includes：Calling Party Release, called control release mode and mutual not control release mode.Under the empty delivery mode processed of caller 4, if calling subscribe elder generation on-hook, called subscriber listens busy tone.In addition, under Calling Party Release, if the on-hook of called subscriber elder generation, then off-hook include following processing with the interaction of route line signaling：Called subscriber's on-hook, the second gateway where called subscriber reports Called Onhook event to soft switch；The first gateway where soft switch subscriber call sends Called Onhook signal；Soft switch notifies the called off-hook event again of the second gateway detection；If called subscriber's off-hook again within a certain period of time, the second gateway reports called off-hook event again to soft switch；Soft switch notifies the first gateway to send called off hook signal again, while detecting calling subscribe's onhook event；Soft switch notifies the second gateway to detect called subscriber's onhook event, and calling subscribe and called subscriber reenter call.Under called control release mode, if called subscriber elder generation on-hook, calling subscribe listens busy tone.In addition, being put in called control Dry under mode, if the on-hook of calling subscribe elder generation, then off-hook include following processing with the interaction of route line signaling：Calling subscribe osmanthus machine, the first gateway where calling subscribe is to the soft switch event that reports that The Calling Party Hooks On；Soft switch notifies the signal that sends that The Calling Party Hooks On of the second gateway where called subscriber；Soft switch notifies the first gateway to detect caller off-hook event again；If calling subscribe's off-hook again within a certain period of time, the first gateway reports caller off-hook event again to soft switch；Soft switch notifies the second gateway to send caller off hook signal again, while detecting called subscriber's onhook event；Soft switch notifies the first gateway to detect calling subscribe's onhook event, and calling subscribe and called subscriber reenter call.In addition, mutually not under control release mode, no matter calling subscribe or the first on-hook of called subscriber, in addition a side all listen busy tone.The present invention is realized under caller control or called control release mode by extending H.248 agreement
Channel associated signalling off hook signal function again.Other features and advantages of the present invention will be illustrated in the following description, also, is partly become apparent from specification, or is understood by implementing the present invention.The purpose of the present invention and other advantages can be realized and obtained by specifically noted structure in the specification, claims and accompanying drawing write.Appended drawings are used for providing a further understanding of the present invention, and constitute a part for specification, together with embodiments of the present invention for explaining the present invention, are not construed as limiting the invention.In the accompanying drawings：Fig. 1 is to show the basic interaction flow of interoffice channel associated signalling in PSTN according to prior art；Fig. 2 be show according to prior art realize in a NGN network with this call flow of roadbed；Fig. 3 is to show the flow for realizing picked up line signal again after call under Calling Party Release in PSTN according to prior art；Fig. 4 is the flow chart for showing the method that channel associated re-offhook line signaling is realized in next generation network according to the present invention；Fig. 5 is to show after called subscriber's on-hook under Calling Party Release according to a first embodiment of the present invention the flow chart of the Signalling exchange of off-hook again；And Fig. 6 is to show after calling subscribe's on-hook under called control release mode according to a second embodiment of the present invention the flow chart of the Signalling exchange of off-hook again.Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred embodiment described herein is merely to illustrate and explain the present invention, and is not intended to limit the present invention.Fig. 4 is the flow chart for showing the method that channel associated re-offhook line signal interaction is realized in next generation network according to the present invention.Reference picture 4, this method includes following processing：Step S402, increases off-hook event again and signal in H.248 related protocol；And step S404, after calling subscribe and called subscriber's end of conversation,
According to being realized between soft switch and gateway described the presence or absence of off hook signal again again off-hook with route line signaling interaction.Wherein, off-hook event and the signal again are extended in the existing bag of H.248 related protocol, or off-hook event and signal again described in extending in the bag newly defined.Preferably, existing bag is channel associated signalling associated packet H.248 defined in serial protocols, including bcas bags, icas bags etc..This sunset is foretold, when being wrapped using new definition, and the rule that docking both sides observe when realizing with route line signaling increases a bag.Delivery mode after calling subscribe and called subscriber's end of conversation includes：Calling Party Release, called control release mode and mutually cutting edge of a knife or a sword is not controlled to put mode.Under Calling Party Release, if calling subscribe elder generation on-hook, called subscriber listens busy tone.In addition, under Calling Party Release, if the on-hook of called subscriber elder generation, then off-hook include following processing with the interaction of route line signaling：Called subscriber's on-hook, the second gateway where called subscriber reports Called Onhook event to soft switch；The first gateway where soft switch subscriber call sends Called Onhook signal；Soft switch notifies the called off-hook event again of the second gateway detection；If called subscriber's off-hook again within a certain period of time, the second gateway reports called off-hook event again to soft switch；Soft switch notifies the first gateway to send called off hook signal again, while detecting calling subscribe's onhook event；Soft switch notifies the second gateway to detect called subscriber's onhook event, and calling subscribe and called subscriber reenter call.Under called control release mode, if called subscriber elder generation on-hook, calling subscribe listens busy tone.In addition, under called control release mode, if the on-hook of calling subscribe elder generation, then off-hook include following processing with the interaction of route line signaling：The first gateway where calling subscribe's on-hook, calling subscribe is to the soft switch event that reports that The Calling Party Hooks On；Soft switch notifies the signal that sends that The Calling Party Hooks On of the second gateway where called subscriber；Soft switch notifies the first gateway to detect caller off-hook event again；If calling subscribe's off-hook again within a certain period of time, the first gateway reports caller off-hook event again to soft switch；Soft switch notifies the second gateway to send caller off hook signal again, while detecting called subscriber's onhook event；Soft switch notifies the first gateway to detect calling subscribe's onhook event, and calling subscribe and called subscriber reenter call.Another sunset is foretold, mutually not under control release mode, no matter calling subscribe or the first on-hook of called subscriber, in addition a side all listen busy tone.Below, reference picture 5 and Fig. 6 specifically describe embodiments of the invention.Wherein, in the first embodiment and the second embodiment, in order to state convenience, to increase off-hook again in the bcas bags in H.248 agreement
Exemplified by event and signal, reans will be defined as by off-hook again.First embodiment Fig. 5 is to show after called subscriber's on-hook under Calling Party Release according to a first embodiment of the present invention the flow chart of the Signalling exchange of off-hook again.Reference picture 5, show it is defined consult reans events and signal under conditions of, under caller delivery mode, calling and called user enters after call after called subscriber's on-hook the embodiment of off-hook again.The first step, called subscriber's on-hook, the gateway B where called subscriber reports Called Onhook (icas/cb) event to soft switch；Second step, the gateway A where soft switch subscriber call sends Called Onhook（Icas/cb) signal;3rd step, the called off-hook again of soft switch notification gateway B detections（Bcas/reans) event；4th step, if called subscriber's off-hook again within a certain period of time, gateway B is to blunt off-hook again (bcas/reans) event in soft switch；5th step, soft switch notification gateway A sends called off-hook again（Bcas/reans) signal, while detecting calling subscribe's on-hook（Icas/cf) event, and the 6th step, soft switch notification gateway B detection called subscriber's on-hooks（Icas/cb) event, then calling and called user reenter call.Second embodiment Fig. 6 is to show after calling subscribe's on-hook under called control release mode according to a second embodiment of the present invention the flow chart of the Signalling exchange of off-hook again.Reference picture 6, shows and is consulted defined under reans events and signal conditioning, under called delivery mode, and calling and called user enters after call after calling subscribe's on-hook the embodiment of off-hook again.The first step, calling subscribe osmanthus machine, gateway A reports caller osmanthus machine to soft switch（Icas/cb) event；Second step, The Calling Party Hooks On for soft switch notification gateway B transmissions（Icas/cb) signal；3rd step, soft switch notification gateway A detects caller off-hook again（Bcas/reans) event;
4th step, if calling subscribe's off-hook again within a certain period of time, gateway A is in soft switch 4 blunt callers off-hook (bcas/reans) event again；5th step, soft switch notification gateway B sends caller off-hook (bcas/reans) signal again, called subscriber's on-hook (icas/cf) event is detected simultaneously, and the 6th step, soft switch notification gateway A detects calling subscribe's on-hook (icas/cf) event, and calling and called user reenters call.Above to extend off-hook event again and ^ in bcas bags (exemplified by speech number, it is to be understood that above-mentioned off-hook event again and signal can extend in existing bag（Such as：Bcas, icas etc.）, it would however also be possible to employ the bag newly defined is realized, but when using new definition bag, the rule that docking both sides observe when realizing increases a bag.By technical scheme, by extension H.248 agreement, realize the channel associated signalling under caller control or called control release mode and the detection of off-hook event and report again, and the transmission of off hook signal again.The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art, the present invention there can be various modifications and variations.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.